Spring for pump



FIG. 1 is a perspective view of a spring for pump showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a top plan view thereof;

FIG. 7 is a bottom plan view thereof;

FIG. 8 is a cross-sectional view of the spring for pump taken along the line 8-8 in FIG. 6 ; and,

FIG. 9 is another cross-sectional view thereof in an environment of use.

The broken lines in the figures illustrate the portions of the design that form no part of the claimed design. 

CLAIM The ornamental design for a spring for pump, as shown and described. 